Novel and highly sensitive fluorescent assay for leucine aminopeptidases

Huazhang Huang, Hiromasa Tanaka, Bruce D. Hammock, Christophe Morisseau

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

l-Leucine aminopeptidases (LAPs) are implicated in the progress of many pathological disorders and play some regulatory roles in tumor cell proliferation, invasion, and/or angiogenesis. Thus, LAPs not only could become new diagnostic or prognostic biomarkers but also may have potential as novel molecular targets for the treatment of several cancers. Highly sensitive assays are critical for early detection of changes in LAP activity and for screening potent LAP inhibitors. In this study, we developed a novel and highly sensitive fluorescent assay for LAPs based on substituted aminopyridines as fluorescent reporters. This assay was at least 100- and 20-fold more sensitive than commercial colorimetric and fluorescent LAP substrates, respectively. We also showed that this assay was a useful tool for monitoring LAP activities in extracts from cancer cell lines, as well as for the high-throughput screening of inhibitors, which could lead to new cancer treatments.

Original languageEnglish (US)
Pages (from-to)11-16
Number of pages6
JournalAnalytical Biochemistry
Volume391
Issue number1
DOIs
StatePublished - Aug 1 2009

Fingerprint

Leucyl Aminopeptidase
Assays
Neoplasms
Screening
Aminopyridines
Oncology
Cell proliferation
Biomarkers
Tumors
Cells
Cell Proliferation
Throughput
Cell Line
Monitoring
Substrates

Keywords

  • Fluorescent assay
  • HTS assay
  • Metallopeptidases
  • N-terminal hydrolysis

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Molecular Biology
  • Cell Biology

Cite this

Novel and highly sensitive fluorescent assay for leucine aminopeptidases. / Huang, Huazhang; Tanaka, Hiromasa; Hammock, Bruce D.; Morisseau, Christophe.

In: Analytical Biochemistry, Vol. 391, No. 1, 01.08.2009, p. 11-16.

Research output: Contribution to journalArticle

Huang, Huazhang ; Tanaka, Hiromasa ; Hammock, Bruce D. ; Morisseau, Christophe. / Novel and highly sensitive fluorescent assay for leucine aminopeptidases. In: Analytical Biochemistry. 2009 ; Vol. 391, No. 1. pp. 11-16.
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